Table 2 Indicators used to construct the city similarity matrix.
From: Near-real-time daily estimates of fossil fuel CO2 emissions from major high-emission cities in China
Indicators index | Indicators |
|---|---|
X1 | GDP |
X2 | Population |
X3 | Industrial output proportion |
X4 | Urbanization ratio |
X5 | GDP per capita |
X6 | Geographic location |
